SOLUTION: in an examination,10% of the student failed in maths,20% failed in english and 5% failed in both.what is the percentage of student who failed in at least one subject?
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Question 966954: in an examination,10% of the student failed in maths,20% failed in english and 5% failed in both.what is the percentage of student who failed in at least one subject?
Answer by rothauserc(4718) (Show Source): You can put this solution on YOUR website!
P(fail at least one)= 1-P(fail none)
=1-(P(fail maths)+P(fail english)-P(fail both))
=1-(0.10+0.20-0.05)
=1-(0.25)
=0.75
percentage of students who failed at least one course is 75%
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